Color-comparing rod.



L. F. 62 M 3. NAFIS. COLOR COMPARING ROD. APPLICATION FILED FEB. 1.491 8.

I Patented Aug. 13,1918.

. INVENTOR.

I v 1 'r'm/nw w shades lit nois, have jointly invented new UNITED STATES PATENT OFFICE.

some r. NAFIS 'AND MABEL sILLsa nears, or nvagasron, I LLINoIsi COLOR-COMPARING B91).

weaves.

- Specification of Letters Patent.

Application ma February 1,1913. se ial at. 214,867.

IWAHEL SILLER NAFIS, both citizens of the,

at Evansateof Illiand useful Inn QIOVGHIBIHVS in Color-Com aring Rods,of which the following is a ful clear, conc1se, and exact descriptlomreferencebeing had to the accompanying drawing, forming a part of this specification.

Our invention relates to rods'for com- United States, and both residing ton, in the county of Cook and t paring the color of'various substances for various purposes.

One-particular use for WhlCll the invention is intended is to procure uniformlty of color of butter for the market. Others are to carry out certain teststo determine,

say, the relative amounts of salt in butter and of acid in milk, cream or whey, and the like. a a a In all such uses it is impossible for the operators to carry in mind the exact shade or shades require Difficulty is also experienced in controlling the added ingredients to produce a'certain shade. Our invention provides unvarying tory form for comparison purposes, so that it is unnecessary to charfge the mind therewith, and a pluralit o graduated shades so that if the exact s ade of a color desired 1n the product has not been obtained, the operator can tell b variation has been obtained.

The color comparing rod of our invention isdurable and sanitary. It is readily kept clean and the colors are protected against contact with the material compared or other external matter and against atmospheric action. It is simple in construction, comparatively cheap to manufacture, convenient to manipulate and satisfactory to operate. Other objects and advantages will appear from the detailed description and claims to follow. I

In the drawings, in which several embodi ments of our invention are shown- F igure 1 is a perspective view showing one embodiment of our invention in use for comparing the color of butter; i

Fig. 2 1s a side elevation of the same;

Fig. 3 is a cross-sectionvof the butter color comparison rod on the line 33 of Fig. 2;

comprises apiece of cylindrical '10 which may be about the size shown in Fig."

other of the at the ends so that the paper will not scorch p or burn when the ends of the tube are sealed,

exact amount of of color in convenient and satisfaccomparison with the various shades whet or or not an allowable may be adopted by nearest to a be compared, the operator will get a sample 4 is a longitudinal section of a rod Referring now to Figs. 1 to 3, theinstru- .ment which we term a color com aring rod .g ass tubing,

2, a-ei, about eight inches long, hermetically Patented Aug. 13, 1918.

having. a difi'erent color producing means;

sealed at both ends,[and a roll of paper 11 fitting snuilsy inside the glass tube and ex tending su tantially' from one end to the tube, enough space being left the "roll of paper being outersurface, with a plura color, in this instance .four ard shades of yellow 12, 13

rovided, on its ity of shades of different stand- 14 and 15, for

I comparing butter colors. These standard colors may range from that corresponding to very pale Ibutter, indicated at 12, to the darker color of natural June butter, indicated at .15. If desired, the spaces of'different color maybe separated by narrow uncolored spaces indicated upper end of the a b ank or uncolored and suitable indicia printed thereon if desired, such as directions for use,

the name of the maker, etc. The roll of paper is of such size that it extends completely around the inside of the glass" tube, and in fact its edges overlap slightly. as indicated in Fig. 3. The natural reslliency of the paper tends to make it unfold, and therefore theoutcr face of the paper is pressed outwardly and snugly lagainstcthe inside of the glass tube. By this construction the colors are clearly visible through the walls of the tube no matter. in What position the tube is held. The size and shape of the tube are such that it can be easily grasped and manipulated.

ThBb diiferentd colors slliown as standard may e iven istin lie in desi ations such as A B, C D, g g gn the trade to indicate the various colors.

One method of using the butter color rod is as follows: If it is desired to determine his. The per roll may be left 7 and these designations which of the standard colors of the rod is quantity of butter which is' to plug? 17 of the butter on a trier, indicated close to the rod, bringing it' adjacent the various standard colors as in Fig. 1, until he decides which standard col-or is closest to the color of the sample. mans case, if he finds that the sample is not the shade required, he can put in a greater or less proportion of coloring matter until he gets a Sample which is the required shade. In the case of a dealer, he can decide whether the butter which he is considering is the shade which he'wants, or can determine to what market it would be best to send it. These rods are intended to be used as a basis of comparison with finished butter at a temperature of about 40 to 50 degrees Fahrenheit, that being the temperature at which it is usually kept, and thewarmer the butter the darker its shade.

The rod, of course, may have any desired number of colors or shades of color. For

some uses twoonly may be preferable. For

example, in making the salt and acidity tests above mentioned, by providing the rods with a minimum and a maximum shade in each, between which it is safe to base the complete neutralization of the sample being tested, the operator is not obliged to add the exact amount of neutralizer necessary to produce a certain color. He has certain limits between which it is safe to work. In these acid test comparison rods, also, the colors are dilferent shades of pink, while in the salt test comparison rods the colors are different shades of reddish brown.

The glass tube, being hermetically sealed at both'ends, protects the paper roll and the colors on the paper roll from atmospheric action and excludes dirt andmois- 'ture. The tube, being of glass and perfectly smooth, without any pockets or depressions, does not soon become dirty, and whenit does it can be easily washed. It prevents the grease from coming into contact with the paper, which not only would be unsanitary but might affect the colors. The glass does not absorb the grease, and the rod may even be inserted in the butter, if desired, without harm to the rod 'or butter. In carrying out the, acidity and salt tests referred to, the comparison rods are conveniently used as stirring rodsto thoroughly mix the ingredients to be tested and compared with the colors in the rods.

V Fig. 4- shows a similar rod but with the different colors 12, 13, 14, etc., formed by In the creamery suitably colored powder or granular material, such, for example, as sand, filling the tube 10, and with the divisions 16 made of cotton wadding, cork or other desired substance to keep the various shades separated.

Fig. 5 shows asimilar rod also, but in this instance the various colors 12", 13", 14', etc., are formed by colored liquid separated by divisions 16, preferably of cork. In fact, the colors may be made in any desired or suitable way, though at present we prefer that of Fig. 2.

Various changes, alterations and modifications may be made in our invention without departing from the principle or scope thereof and as defined or intended to be defined in the appended claims.

What we claim and desire to secure by Letters Patent is 1. A color comparing rod comprising a hand rod having a plurality of colors at different points of its length and separately visible for comparison purposes.

2. A color comparing rod comprising a glass rod having a plurality of colors at different points of its length and visible from the exterior.

3. A color comparing rod comprising a. transparent rod, and a plurality of separate colors therein andvisible through said rod.

4. Acolor comparing rod comprising a. glass tube, and a plurality of separate colors therein and visible through said tube.

5. A color comparing rod comprising a glass tube, a plurality of colors on paper in said tube and visible at different points of its length from the exterior of the tube.

6. A color comparing rod comprising a hermetically sealed glass tube, and a roll of paper snugly fitting the inside surface of said tube and provided with a plurality of colors visible from the exterior of the tube. 7 A butter color comparing rod comprising a hermetically sealed glass tube, and a plurality of butter colors in said tube.

8. A color-comparing rod comprising a hand-rod having its outer surface of a material non-soluble in water and having a plurality of colors at different points of its length and separately visible for comparison purposes.

In witness whereof, we have hereunto subscribed our names.

MABEL SILLER NAFIS. LOUIS F. NAFIS. 

